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miflorad/cmd/munin-miflora/main.go

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package main
import (
"context"
"flag"
"fmt"
"os"
"regexp"
"strings"
"time"
impl "miflorad/common/ble"
"github.com/go-ble/ble"
"github.com/go-ble/ble/examples/lib/dev"
)
const discoveryTimeout = 4 * time.Second
const connectionTimeout = 4 * time.Second
func readData(client ble.Client, profile *ble.Profile) {
prefix := flag.Args()[0]
regexNonAlphaNumeric, err4 := regexp.Compile("[^a-z0-9]+")
if err4 != nil {
fmt.Fprintf(os.Stderr, "Failed to compile regex, err: %s\n", err4)
}
id := regexNonAlphaNumeric.ReplaceAllString(strings.ToLower(flag.Args()[1]), "")
metaData, err := impl.RequestVersionBattery(client, profile)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to request version battery, err: %s\n", err)
return
}
fmt.Fprintf(os.Stderr, "Firmware version: %s\n", metaData.FirmwareVersion)
fmt.Fprintf(os.Stdout, "%s.miflora.%s.battery_level %d %d\n", prefix, id, metaData.BatteryLevel, time.Now().Unix())
fmt.Fprintf(os.Stdout, "%s.miflora.%s.firmware_version %d %d\n", prefix, id, metaData.NumericFirmwareVersion(), time.Now().Unix())
// for the newer models a magic number must be written before we can read the current data
if metaData.FirmwareVersion >= "2.6.6" {
err2 := impl.RequestModeChange(client, profile)
if err2 != nil {
fmt.Fprintf(os.Stderr, "Failed to request mode change, err: %s\n", err2)
return
}
}
sensorData, err3 := impl.RequestSensorData(client, profile)
if err3 != nil {
fmt.Fprintf(os.Stderr, "Failed to request sensor data, err: %s\n", err3)
return
}
fmt.Fprintf(os.Stdout, "%s.miflora.%s.temperature %.1f %d\n", prefix, id, sensorData.Temperature, time.Now().Unix())
fmt.Fprintf(os.Stdout, "%s.miflora.%s.brightness %d %d\n", prefix, id, sensorData.Brightness, time.Now().Unix())
fmt.Fprintf(os.Stdout, "%s.miflora.%s.moisture %d %d\n", prefix, id, sensorData.Moisture, time.Now().Unix())
fmt.Fprintf(os.Stdout, "%s.miflora.%s.conductivity %d %d\n", prefix, id, sensorData.Conductivity, time.Now().Unix())
}
func main() {
flag.Parse()
if len(flag.Args()) != 2 {
fmt.Fprintf(os.Stderr, "Usage: %s [options] prefix peripheral-id\n", os.Args[0])
os.Exit(1)
}
{
device, err := dev.NewDevice("default")
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to open device, err: %s\n", err)
os.Exit(1)
}
ble.SetDefaultDevice(device)
}
filter := func(adv ble.Advertisement) bool {
return strings.ToUpper(adv.Addr().String()) == strings.ToUpper(flag.Args()[1])
}
fmt.Fprintln(os.Stderr, "Scanning...")
ctx := ble.WithSigHandler(context.WithTimeout(context.Background(), discoveryTimeout))
client, err := ble.Connect(ctx, filter)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to connect to %s, err: %s\n", flag.Args()[1], err)
os.Exit(1)
}
// Source: https://github.com/go-ble/ble/blob/master/examples/basic/explorer/main.go#L53
// Make sure we had the chance to print out the message.
done := make(chan struct{})
// Normally, the connection is disconnected by us after our exploration.
// However, it can be asynchronously disconnected by the remote peripheral.
// So we wait(detect) the disconnection in the go routine.
go func() {
<-client.Disconnected()
fmt.Fprintln(os.Stderr, "Disconnected")
close(done)
}()
fmt.Fprintln(os.Stderr, "Connected")
profile, err := client.DiscoverProfile(true)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to discover profile, err: %s\n", err)
os.Exit(1)
}
readData(client, profile)
fmt.Fprintln(os.Stderr, "Connection done")
client.CancelConnection()
<-done
}